Natamycin  is  an  important  tetraene  (polyene)  antibiotic  produced  in  submerged  culture  by  different strains  of  Streptomyces  sp.  In  the  present  work,  the  effects  of  the  addition  of  short-chain  carboxylic  acids (acetic,  propionic  and  butyric)  on  cell  growth  and  the  kinetics  of  natamycin  production  were  investigated during  submerged  cultivation  of  Streptomyces  natalensis.

The ethnopharmaceutical approach is important for the discovery and development of natural product research and requires a deep understanding not only of biometabolites discovery and profiling but also of cultural and social science. For millennia, epigeous macrofungi (mushrooms) and hypogeous macrofungi (truffles) were considered as precious food in many cultures based on their high nutritional value and characterized pleasant aroma. In African and Middle Eastern cultures, macrofungi have long history as high nutritional food and were widely applied in folk medicine.

Background: Hepatocellular carcinoma is one of the leading causes of mortalities worldwide. The search for new therapeutic targets is of utmost importance for improved treatment. Altered expression of HDAC1 in hepatocellular carcinoma (HCC) and its requirement for liver formation in zebrafish, suggest that it may regulate key events in liver carcinogenesis and organogenesis. However, molecular mechanisms of HDAC1 action in liver carcinogenesis are largely unknown.

In this study, a new amylase producer strain was isolated from sweet potato tuber. This strain was able to grow at 37 °C and produce α-amylase in high quantity compared to other standard strain cultures. In the first part, cultivation in shake flask in  standard medium was carried out to give complete information about the growth and production kinetics of this strain.

This report concerns nanofiber composites that incorporate N-heterocyclic carbenes and the use of such composites for testing antimicrobial and antifungal activities. The nanofiber composites were produced by electrospinning mixtures of the gold chloride or gold acetate complexes of a bis(imino)acenaphthene (BIAN)-supported NHC with aqueous solutions of polyvinyl alcohol (PVA). The products were characterized by scanning-electron microscopy, which revealed that nanofibers in the range of 250–300 nm had been produced.

The effect of pumphead type and operating pressure on cell viability and cell separaion efficiency was investigated during hydrocyclone separation recombinant CHO cells producing human GM-CSF.